Protectionism in the United States is protectionist economic policy that erects tariffs and other barriers on imported goods. In the US this policy was most prevalent in the 19th century.

When did protectionism start and end?

From 1789 through 1913, the United States favored protectionist policies.

Why was protectionism created?

Protective tariffs have historically been employed to stimulate industries in countries beset by recession or depression. Protectionism may be helpful to emergent industries in developing nations. It can also serve as a means of fostering self-sufficiency in defense industries.